05-27-2009, 07:35 am
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| Corvette Enthusiast Join Date: May 2009 Posts: 1
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|  ECM replacement
I have a 91 vette with 49000 miles. Car started idling rough last fall. Car was stored for the winter. When I started this past weekend it would hardly idle at all. about 30 seconds after it was running the cooling fans came on and when I stepped on the gas the engine would die..I'm thinking the ECM is bad. It already has a re-manufactured unit in it. What do I have to do to change it? I'm reading about changing th PROM form one unit to the other, but I don't know how to do this. Please help!
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05-27-2009, 12:14 pm
| #2 | ||||||||||||||||||||
| GM World Class Certified Technician  Join Date: Nov 2006 Location: New Haven Ct Posts: 5,141
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HI there, You MIGHT want to check your injector coil resistance FIRST before anything else. 16.5 ohms resistance is what you should have on a cold engine. Post up your readings. Allthebest, c4c5 | ||||||||||||||||||||
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